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<div id="layout">
  <div id="layout-content"><div id="sqlite3.querysingle" class="refentry">
 <div class="refnamediv">
  <h1 class="refname">SQLite3::querySingle</h1>
  <p class="verinfo">(PHP 5 &gt;= 5.3.0, PHP 7, PHP 8)</p><p class="refpurpose"><span class="refname">SQLite3::querySingle</span> &mdash; <span class="dc-title">Executes a query and returns a single result</span></p>

 </div>

 <div class="refsect1 description" id="refsect1-sqlite3.querysingle-description">
  <h3 class="title">说明</h3>
  <div class="methodsynopsis dc-description">
   <span class="modifier">public</span> <span class="methodname"><strong>SQLite3::querySingle</strong></span>(<span class="methodparam"><span class="type">string</span> <code class="parameter">$query</code></span>, <span class="methodparam"><span class="type">bool</span> <code class="parameter">$entireRow</code><span class="initializer"> = <strong><code>false</code></strong></span></span>): <span class="type"><a href="language.types.declarations.html#language.types.declarations.mixed" class="type mixed">mixed</a></span></div>

  <p class="para rdfs-comment">
   Executes a query and returns a single result.
  </p>
 </div>


 <div class="refsect1 parameters" id="refsect1-sqlite3.querysingle-parameters">
  <h3 class="title">参数</h3>
  <p class="para">
   <dl>
    
     <dt>
<code class="parameter">query</code></dt>

     <dd>

      <p class="para">
       The SQL query to execute.
      </p>
     </dd>

    
    
     <dt>
<code class="parameter">entireRow</code></dt>

     <dd>

      <p class="para">
       By default, <span class="function"><strong>querySingle()</strong></span> returns the value of the
       first column returned by the query. If
       <code class="parameter">entireRow</code> is <strong><code>true</code></strong>, then it returns an array
       of the entire first row.
      </p>
     </dd>

    
   </dl>

  </p>

 </div>


 <div class="refsect1 returnvalues" id="refsect1-sqlite3.querysingle-returnvalues">
  <h3 class="title">返回值</h3>
  <p class="para">
   Returns the value of the first column of results or an array of the entire
   first row (if <code class="parameter">entireRow</code> is <strong><code>true</code></strong>).
  </p>
  <p class="para">
   If the query is valid but no results are returned, then <strong><code>null</code></strong> will be
   returned if <code class="parameter">entireRow</code> is <strong><code>false</code></strong>, otherwise an
   empty array is returned.
  </p>
  <p class="para">
   Invalid or failing queries will return <strong><code>false</code></strong>.
  </p>
 </div>


 <div class="refsect1 examples" id="refsect1-sqlite3.querysingle-examples">
  <h3 class="title">范例</h3>
  <p class="para">
   <div class="example" id="example-1953">
    <p><strong>示例 #1 <span class="function"><strong>SQLite3::querySingle()</strong></span> example</strong></p>
    <div class="example-contents">
<div class="phpcode"><code><span style="color: #000000">
<span style="color: #0000BB">&lt;?php<br />$db&nbsp;</span><span style="color: #007700">=&nbsp;new&nbsp;</span><span style="color: #0000BB">SQLite3</span><span style="color: #007700">(</span><span style="color: #DD0000">'mysqlitedb.db'</span><span style="color: #007700">);<br /><br /></span><span style="color: #0000BB">var_dump</span><span style="color: #007700">(</span><span style="color: #0000BB">$db</span><span style="color: #007700">-&gt;</span><span style="color: #0000BB">querySingle</span><span style="color: #007700">(</span><span style="color: #DD0000">'SELECT&nbsp;username&nbsp;FROM&nbsp;user&nbsp;WHERE&nbsp;userid=1'</span><span style="color: #007700">));<br /></span><span style="color: #0000BB">print_r</span><span style="color: #007700">(</span><span style="color: #0000BB">$db</span><span style="color: #007700">-&gt;</span><span style="color: #0000BB">querySingle</span><span style="color: #007700">(</span><span style="color: #DD0000">'SELECT&nbsp;username,&nbsp;email&nbsp;FROM&nbsp;user&nbsp;WHERE&nbsp;userid=1'</span><span style="color: #007700">,&nbsp;</span><span style="color: #0000BB">true</span><span style="color: #007700">));<br /></span><span style="color: #0000BB">?&gt;</span>
</span>
</code></div>
    </div>

    <div class="example-contents"><p>以上例程的输出类似于：</p></div>
    <div class="example-contents screen">
<div class="cdata"><pre>
string(5) &quot;Scott&quot;
Array
(
    [username] =&gt; Scott
    [email] =&gt; scott@example.com
)
</pre></div>
    </div>
   </div>
  </p>
 </div>


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